hetzenmat

The app is called "Mindfulness Coach". The search is easier with this information.

Note that this refers to ML as in machine learning and not the ML language family, as I hoped.

>> Everything is a Graph >> Lisp: everything’s a list

Actually, the universal 'cons' cell data type of LISP (which is used to build lists) allows to represent graphs. Take, for example, Common Lisp. There are read-macros which make this possible: The expression #1=(hello . #1#) builds a circular list that only contains the symbol "hello" [1]. This example can be extended to build graphs.

[1]: https://letoverlambda.com/index.cl/guest/chap3.html#sec_5

Everytime I read something like "learn ML" I think about learning some descendant of the ML programming language like OCaml, F# or Standard ML instead of machine learning.